Anglo - Noise reduction will not change the length of time a track runs and a fade in or out from the start or end of a track should still start or finish at the same point but at a very low volume. Unless you cut the track short, the time duration of the track ought to still be the same.
That said, the ID software probably has some level of error correction built into it to allow for different CD players running at different speeds.
Quack!
GtD.